The Rb+-Rb collision rate in the energy range of 10(3)-10(4) K

摘要: We study both theoretically and experimentally the energy dependence of low-energy Rb+-Rb total collision rate k(ia) in range from 10(3) to 10(4) K. calculate integral elastic cross-section resonant charge-transfer by quantum mechanical molecular orbital close-coupling method, then obtain for temperatures averaging cross-sections over a Maxwell-Boltzmann velocity distribution. The experiments are conducted an ion-neutral hybrid trap, where Rb+ ions created photo-ionization cold atoms magneto-optic trap (MOT) accumulated linear Paul ion trap. ion-atom is measured monitoring fluorescence reduction steady-state MOT sequentially introducing collisions. E-col approximate T-i modified changing due being more than six orders magnitude larger T-a atoms. temperature obtained comparing time-of-flight mass spectrometry experimental results that SIMION simulation. equilibrium steady initial root-mean-squared position cloud, with 8000 16 000 Both theoretical show increases E-col. More specifically, rapidly enlargement near 10 calculation slowly specific difference may be influence ratio excited states f(e) on trend at different